/** {@inheritDoc} */
public long getLocalTime(long ssrc, long rtp0) {
// don't use getSSRCDesc, because we don't want to create an instance
SSRCDesc ssrcDesc = ssrcs.get(ssrc);
if (ssrcDesc == null) {
return -1;
}
// get all required times
long clockRate; // the clock rate for the RTP clock for the given SSRC
long rtp1; // some time X in the RTP clock for the given SSRC
double ntp1; // the same time X in the source's wallclock
String endpointId;
synchronized (ssrcDesc) {
clockRate = ssrcDesc.clockRate;
rtp1 = ssrcDesc.rtpTime;
ntp1 = ssrcDesc.ntpTime;
endpointId = ssrcDesc.endpointId;
}
// if something is missing, we can't calculate the time
if (clockRate == -1 || rtp1 == -1 || ntp1 == -1.0 || endpointId == null) {
return -1;
}
Endpoint endpoint = endpoints.get(ssrcDesc.endpointId);
if (endpoint == null) {
return -1;
}
double ntp2; // some time Y in the source's wallclock (same clock as for ntp1)
long local2; // the same time Y in the local clock
synchronized (endpoint) {
ntp2 = endpoint.ntpTime;
local2 = endpoint.localTime;
}
if (ntp2 == -1.0 || local2 == -1) {
return -1;
}
// crunch the numbers. we're looking for 'local0',
// the local time corresponding to 'rtp0'
long local0;
double diff1S = ntp1 - ntp2;
double diff2S = ((double) TimeUtils.rtpDiff(rtp0, rtp1)) / clockRate;
long diffMs = Math.round((diff1S + diff2S) * 1000);
local0 = local2 + diffMs;
return local0;
}
/**
* Removes the RTP-NTP mapping for a given SSRC.
*
* @param ssrc the SSRC for which to remove the RTP-NTP mapping
*/
void removeMapping(long ssrc) {
if (ssrcs.containsKey(ssrc)) {
synchronized (ssrcs) {
SSRCDesc ssrcDesc = ssrcs.get(ssrc);
if (ssrcDesc != null) {
synchronized (ssrcDesc) {
ssrcDesc.ntpTime = -1.0;
ssrcDesc.rtpTime = -1;
}
}
}
}
}
/**
* Returns the <tt>SSRCDesc</tt> instance mapped to the SSRC <tt>ssrc</tt>. If no instance is
* mapped to <tt>ssrc</tt>, create one and inserts it in the map. Always returns non-null.
*
* @param ssrc the ssrc to get the <tt>SSRCDesc</tt> for.
* @return the <tt>SSRCDesc</tt> instance mapped to the SSRC <tt>ssrc</tt>.
*/
private SSRCDesc getSSRCDesc(long ssrc) {
SSRCDesc ssrcDesc = ssrcs.get(ssrc);
if (ssrcDesc == null) {
synchronized (ssrcs) {
ssrcDesc = ssrcs.get(ssrc);
if (ssrcDesc == null) {
ssrcDesc = new SSRCDesc();
ssrcs.put(ssrc, ssrcDesc);
}
}
}
return ssrcDesc;
}
/**
* Returns the <tt>Endpoint</tt> with id <tt>endpointId</tt>. Creates an <tt>Endpoint</tt> if
* necessary. Always returns non-null.
*
* @param endpointId the string identifying the endpoint.
* @return the <tt>Endpoint</tt> with id <tt>endpointId</tt>. Creates an <tt>Endpoint</tt> if
* necessary.
*/
private Endpoint getEndpoint(String endpointId) {
Endpoint endpoint = endpoints.get(endpointId);
if (endpoint == null) {
synchronized (endpoints) {
endpoint = endpoints.get(endpointId);
if (endpoint == null) {
endpoint = new Endpoint();
endpoints.put(endpointId, endpoint);
}
}
}
return endpoint;
}
/**
* Closes given {@link #transportManagers} of this <tt>Conference</tt> and removes corresponding
* channel bundle.
*/
void closeTransportManager(TransportManager transportManager) {
synchronized (transportManagers) {
for (Iterator<IceUdpTransportManager> i = transportManagers.values().iterator();
i.hasNext(); ) {
if (i.next() == transportManager) {
i.remove();
// Presumably, we have a single association for
// transportManager.
break;
}
}
// Close manager
try {
transportManager.close();
} catch (Throwable t) {
logger.warn(
"Failed to close an IceUdpTransportManager of" + " conference " + getID() + "!", t);
// The whole point of explicitly closing the
// transportManagers of this Conference is to prevent memory
// leaks. Hence, it does not make sense to possibly leave
// TransportManagers open because a TransportManager has
// failed to close.
if (t instanceof InterruptedException) Thread.currentThread().interrupt();
else if (t instanceof ThreadDeath) throw (ThreadDeath) t;
}
}
}
/**
* Returns, the <tt>TransportManager</tt> instance for the channel-bundle with ID
* <tt>channelBundleId</tt>. If no instance exists and <tt>create</tt> is <tt>true</tt>, one will
* be created.
*
* @param channelBundleId the ID of the channel-bundle for which to return the
* <tt>TransportManager</tt>.
* @param create whether to create a new instance, if one doesn't exist.
* @return the <tt>TransportManager</tt> instance for the channel-bundle with ID
* <tt>channelBundleId</tt>.
*/
IceUdpTransportManager getTransportManager(String channelBundleId, boolean create) {
IceUdpTransportManager transportManager;
synchronized (transportManagers) {
transportManager = transportManagers.get(channelBundleId);
if (transportManager == null && create && !isExpired()) {
try {
// FIXME: the initiator is hard-coded
// We assume rtcp-mux when bundle is used, so we make only
// one component.
transportManager = new IceUdpTransportManager(this, true, 1);
} catch (IOException ioe) {
throw new UndeclaredThrowableException(ioe);
}
transportManagers.put(channelBundleId, transportManager);
}
}
return transportManager;
}
/**
* Adds the channel-bundles of this <tt>Conference</tt> as
* <tt>ColibriConferenceIQ.ChannelBundle</tt> instances in <tt>iq</tt>.
*
* @param iq the <tt>ColibriConferenceIQ</tt> in which to describe.
*/
void describeChannelBundles(ColibriConferenceIQ iq) {
synchronized (transportManagers) {
for (Map.Entry<String, IceUdpTransportManager> entry : transportManagers.entrySet()) {
ColibriConferenceIQ.ChannelBundle responseBundleIQ =
new ColibriConferenceIQ.ChannelBundle(entry.getKey());
entry.getValue().describe(responseBundleIQ);
iq.addChannelBundle(responseBundleIQ);
}
}
}
/** Closes the {@link #transportManagers} of this <tt>Conference</tt>. */
private void closeTransportManagers() {
synchronized (transportManagers) {
for (Iterator<IceUdpTransportManager> i = transportManagers.values().iterator();
i.hasNext(); ) {
IceUdpTransportManager transportManager = i.next();
i.remove();
closeTransportManager(transportManager);
}
}
}
